code: def f(self, solution):
      # This is where the metaheuristic is defined
      return random.random()
  
file_path: advisor/advisor_server/suggestion/algorithm/particle_swarm_optimization.py
imports: from __future__ import print_function
  import json
  import random
  from suggestion.models import Study
  from suggestion.models import Trial
  from suggestion.algorithm.abstract_algorithm import AbstractSuggestionAlgorithm
label_desc: Use image node_id 3 for calling the ParticleSwarmOptimizer obj's underlying member method code with example usage: obj.f(solution) and returns: random